6.
How to predict ratings ?
Credit: [Bell and Koren, 2007]
Joe like We were
soldiers, Black Hawk
down.
Bob and Alice like the
same ﬁlms, and also
like Saving private
Ryan.
Joe should watch
Saving private Ryan,
because all of them
indeed likes war ﬁlms.
Need to uncover topics in items
Arthur Mensch Dictionary Learning for Massive Matrix Factorization 5 / 28